Top Pet-friendly Grassy Key Hotels

Rainbow Bend Resort

57784 Overseas Hwy, Marathon, FL

22 min walk from Dolphin Research Center

This pet-friendly, oceanfront hotel welcomes dogs for an additional fee. Nearby Sunset Park Beach is a good place to stretch your legs if you need a walk.

8/10 Very Good! (743 reviews)

"We had a wonderful week at Rainbow Bend. Pool was awesome. Good breakfast. Staff was very accommodating. I would love to do it all over again!!"

Reviewed on Oct 2, 2025

Grassy Flats Resort & Beach Club

58182 Overseas Hwy, Marathon, FL

14 min walk from Dolphin Research Center

This hotel is pet-friendly, allowing dogs with an additional fee. If you're going for a walk during your stay, swing by nearby Sunset Park Beach.

9.4/10 Exceptional! (322 reviews)

"The place is beautiful and very relaxing the staff very nice and accommodating the only thing that needs updating is the mattresses not very comfortable other than that is a hidden gem"

Reviewed on Oct 6, 2025

Gulf View Waterfront Resort

58743 OVERSEAS HWY, Marathon, FL

4 min walk from Dolphin Research Center

Dogs and cats are welcome (fees apply) at this pet-friendly hotel offering pet-approved amenities, like a dog park. For a walk during your stay, seek out nearby ...

8.4/10 Very Good! (504 reviews)

"Amazing view"

Reviewed on Oct 1, 2025

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Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.